iommu/amd: Preallocate dma_ops apertures based on dma_mask

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Preallocate between 4 and 8 apertures when a device gets it
dma_mask. With more apertures we reduce the lock contention
of the domain lock significantly.

Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Joerg Roedel 2015-12-22 16:06:49 +01:00

parent 7b5e25b84e

commit a639a8eecf

1 changed files with 53 additions and 7 deletions

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drivers/iommu/amd_iommu.c

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